I just upgraded to firefox 4 and it won't play any videos on the internet. Is there a fix for this or how can I go back to the previous version.

my firefox 4 wont play any videos. adobe flash player says its not compatible with this arcitecture. Did anyone bother to test this before releasing it.

I appreciate you taking the time to respond, but I don't want to uninstall my persona. I want to uninstall FireFox 4. I love my persona.
It really bugs the crap out of me when FireFox sends these upgrades around and I click "yes" to install them then my entire desktop stops working.
Is it always necessary for their upgrades to render the add-ons that people develop useless?

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